How do we know Jesus has authority over life and death?

In the Gospel of John, Jesus performs miracles that serve as testimony to His divine authority. The healing of the nobleman's son from a distance is a clear demonstration that Jesus holds dominion even over death. When Jesus commands, 'Go thy way; thy son liveth,' He affirms not only His power to heal, but also His identity as the Son of God, who has authority over both life and death. This miracle is intended to encourage belief in those witnessing it, showcasing that faith in Christ surpasses earthly understanding and reliance on visible signs.